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    <meta charset="utf-8">
    <title>活动统计系统</title>
    <script type="text/javascript">
      // Single Page Apps for GitHub Pages
      // MIT License
      // https://github.com/rafgraph/spa-github-pages
      // This script takes the current url and converts the path and query
      // string into just a query string, and then redirects the browser
      // to the new url with only a query string and hash fragment.
      //
      // For example:
      //   https://www.foo.tld/one/two?a=b&c=d#e
      // becomes:
      //   https://www.foo.tld/?/one/two&a=b~and~c=d#e
      //
      // Note: this 404.html file must be at least 512 bytes for it to work
      // with Internet Explorer (it is currently > 512 bytes)
      //
      // If you're creating a Project Pages site and NOT using a custom domain,
      // then set pathSegmentsToKeep to 1 (enterprise users may need to set it to > 1).
      // This is because Project Pages sites are served from a subdirectory of the username.github.io domain.
      //
      // Please use the following URL structure to get rid of the 404.html file:
      // `https://username.github.io/repo-name/`
      var pathSegmentsToKeep = 1;
      var l = window.location;
      l.replace(
        l.protocol + '//' + l.hostname + (l.port ? ':' + l.port : '') +
        l.pathname.split('/').slice(0, 1 + pathSegmentsToKeep).join('/') + '/?/' +
        l.pathname.slice(1).split('/').slice(pathSegmentsToKeep).join('/').replace(/&/g, '~and~') +
        (l.search ? '&' + l.search.slice(1).replace(/&/g, '~and~') : '') +
        l.hash
      );
    </script>
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